The definitions in subpart A of this part apply to this subpart. The following definitions also apply to this subpart:

Exemption means exemption from the prohibitions of §90.1003.

Export exemption means an exemption granted under §90.1004(b) for the purpose of exporting new nonroad engines.

National security exemption means an exemption granted under §90.1004(b) for the purpose of national security.

Manufacturer-owned nonroad engine means an uncertified nonroad engine owned and controlled by a nonroad engine manufacturer and used in a manner not involving lease or sale by itself or in a vehicle employed from year to year in the ordinary course of business for product development, production method assessment, and market promotion purposes.

Testing exemption means an exemption granted under §90.1004(b) for the purpose of research, investigations, studies, demonstrations or training, but not including national security.